Great Map! By the way as a hack: you could palce a Event-Trigger on one site and a Point-Trigger on the other site and write a osiris call to teleport character to the Point trigger when entering the Event-Trigger. Or you could also populate the space below the Bridge with some Stones and put a small item in there and add a onUse teleport Action to it, so it would look like the Player would squeeze through a small passage below the Bridge. Just some ideas to make it more natural - also if you want to use it as addon or standalone.

Looking forward to your next maps

PS: If you need some Code snipets let me know via PM!